That instructors job is to teach the average beginner (more often than not children), not a 37 year old with no experience and a season pass, who's on a mission to become an expert rider in 20 days or less, and obviously spends wayyyy too much time on the internet, pouring over every tiny technical detail of snowboarding dynamics.
I almost feel sorry for the instructor. I really can't believe you'd sign up for a lesson in the first place. You need to teach yourself... get on the board and point it down the hill.... repeat. You just don't sound teachable at this point... your "stubborn old guy" ways no longer allow for that sort of thing, more along sir.